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Finding the Fourth Proportional to 57,936.80, 86,856.60 and 30,234.80

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Solution

The fourth proportional to 57,936.80, 86,856.60 and 30,234.80 is: 45,326.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,936.80 : 86,856.60 = 30,234.80 : x
  2. Step 2: Convert to fraction form
    57,936.80/86,856.60 = 30,234.80/x
  3. Step 3: Cross multiply
    57,936.80x = 86,856.60 × 30,234.80
  4. Step 4: Simplify right side
    57,936.80x = 2,626,091,929.68
  5. Step 5: Solve for x
    x = 2,626,091,929.68/57,936.80
  6. Step 6: Final answer
    x = 45,326.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.